JPH06339649A - Gas discharge method of coating drying room - Google Patents

Abstract

(57) [Summary] [Object] The present invention is intended to provide a method for exhausting a coating drying chamber for applying a correction coating to an object such as a vehicle and performing a drying treatment after the coating. . [Structure] The present invention relates to a ceiling air supply chamber portion R of a coating / drying chamber R.
_The air supply duct 1 is communicated with ₁ and the exhaust duct 3 is communicated with the underfloor portion R ₁ of the coating / drying room R, with respect to the object 100 installed on the floor surface in the coating / drying room R. In a coating drying room in which hot air is sent from the air supply duct 1 to the ceiling part in the coating drying room R and exhausted from the exhaust duct 3 under the floor to dry the coated surface of the object 100. There is a method for exhausting a coating drying chamber in which the floor suction port of the exhaust duct 3 is freely opened to the entire surface or a part of the floor. For example, at the time of coating, the floor suction port is opened to the entire surface of the floor. At the time of drying, it is possible to open only a part such as the central bottom surface of the object 100, which accelerates the hot air flow rate, increases the amount of heat supplied to the object 100 side, and quickly raises the temperature. Is achieved The temperature difference in each part of the object 100 is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of exhausting a coating / drying chamber for applying a correction coating to an object such as a vehicle and performing a drying process after the coating.

[0002]

2. Description of the Related Art In a vehicle repair shop or the like, in order to repair damage such as paint damage caused by an accident, a part of the factory is used for the purpose of performing correction paint or full-scale paint, and after this paint, drying treatment. Often equipped with equipment to have a paint drying room. As such a coating / drying chamber, various structures have been conventionally proposed. One of them is to connect an air supply duct to the ceiling air supply chamber of the coating / drying chamber and An exhaust duct is connected to the part, and at the time of painting, the desired paint is sprayed onto the vehicle (object) brought into the room during painting, while at the time of drying, the air is drawn from the air supply duct to the inside of the painting / drying room for the vehicle during drying. There is provided a coating drying chamber in which hot air is sent to the ceiling portion and is exhausted from an exhaust duct under the floor to dry the coated surface of the vehicle.

Supply of hot air to such a coating and drying room is
In a hot air generator (apparatus), a combustion burner or the like is ignited to burn fuel (oil, gas, etc.) to obtain it.
The amount of air flow during painting is suppressed to about 1/2 to 1/3 to reduce the air flow, and consideration is given to increase the temperature in the room in a short time.

[0004]

However, in such a method in which hot air is sent out from the ceiling air supply chamber portion of the paint drying chamber in which the air supply duct is communicated and exhausted from the underfloor exhaust duct, on the floor surface inside the room, It was extremely difficult to uniformly heat and dry each part of the vehicle carried in and installed in the car. For example,
In the case of vehicles, there is a considerable height in the vertical direction,
Some components are horizontal and some are vertical. For example, the outer surfaces of the roof, bonnet, trunk cover, etc. are high and horizontal, so they are easily heated by hot air,
Although these parts rise to the drying temperature in a relatively short time, the side surface of the body and the door part are also low in height and are vertical or inclined parts, so even with the same amount of hot air,
This is because it is difficult to heat and a temperature difference occurs. Especially in the lower part of the side surface of the door, the temperature is hard to rise due to the increase in heat capacity due to the inner lining and various equipment and the heat insulation effect due to the presence of these members, and the temperature difference with other parts is large. It was easy to become.

In a state where such a temperature difference occurs,
There is a problem in that it takes time to raise the temperature of the lower part of the side surface of the door where it is difficult to raise the temperature to the drying temperature and the workability deteriorates. In this case, there is a problem that not only the workability is deteriorated, but also the roof portion, which is a portion where the temperature easily rises, is excessively heated. Therefore, conventionally,
Various methods have been proposed in order to eliminate the above temperature difference, but all of them are still insufficient.

The present invention has been made in view of the above conventional circumstances, and controls the exhaust form on the floor side of the exhaust duct as appropriate so as to cover the entire surface of the object carried in the coating and drying chamber. This is a method of exhausting the coating and drying room, aiming to make the temperature rise uniform and shorten the time.

[0007]

The feature of the present invention resides in that an air supply duct is communicated with a ceiling air supply chamber of the coating drying chamber and an exhaust duct is provided under the floor of the coating drying chamber. In communication, with respect to the object installed on the floor surface of the coating drying chamber, while sending hot air from the air supply duct to the ceiling portion of the coating drying chamber, exhaust from the exhaust duct under the floor, In the coating drying chamber for drying the coated surface of the object, there is provided a method for exhausting the coating drying chamber in which the floor suction port of the exhaust duct is freely opened to the entire surface or a part of the floor.

[0008]

As described above, according to the present invention, since the floor suction port on the exhaust duct side can be freely opened to the whole surface or a part of the floor, for example, at the time of painting, the floor suction port is opened to the entire surface of the floor. Thus, the coating can be sprayed onto the object to be coated, while at the time of drying, only a part of the central bottom surface of the object can be opened. As a result, the hot air flow velocity is accelerated near the floor of the coating / drying room, that is, near the bottom of the object, the amount of heat supplied to the object is increased, and a rapid temperature rise is achieved. That is, at the same time that each part of the target object quickly reaches the drying temperature, the temperature difference in each part of the target object is eliminated, and the drying temperature is made uniform.

[0009]

1 to 3 show an embodiment of a coating / drying apparatus system for carrying out the method for exhausting a coating / drying chamber according to the present invention. In these drawings, R is a coating / drying chamber for performing a modified coating or a full-scale coating of an object 100 (hereinafter abbreviated as a vehicle) such as a vehicle, or a drying process after these coatings. Although the outer plate (side plate) has a closed structure composed of a single panel such as a normal steel plate, opening and closing doors (not shown) in front and rear of the room can be opened and closed when the vehicle 100 is taken in and out.

Further, a ceiling air supply chamber portion R ₁ is provided in the ceiling portion of the coating / drying room R, and the air supply duct 1 communicates with the ceiling air supply chamber portion R ₁ , and An exhaust duct 3 communicates with the underfloor portion R ₂ via a pit 2 or the like. The air supply duct 1 is provided with a primary filter 4, a blower fan 5, an air volume switching damper 6, a hot air generator 7 with a combustion burner 8 and a ceiling air supply chamber portion R ₁ from the side for taking in external air. The next filter 9 is incorporated so that outside air or hot air can be sent from the ceiling air supply chamber portion R ₁ communicating with the air supply duct 1 to the vehicle 100 carried into the paint drying chamber R. ing.

On the other hand, on the indoor floor side of the exhaust duct 3, a plurality of open / close floor blocks 210 each having a floor suction port 211 openable and closable, and a floor suction port 221 are always open. The normally open floor block 220 is laid in combination, and the exhaust filter 10 and the exhaust fan 11 are incorporated in the portion extending from the pit 2 portion of the floor, and the air or hot air in the room is sucked and exhausted. It is supposed to be done.

The open / close floor block 210 is shown in FIG.
As shown in FIG. 5, a plurality of floor suction ports 211 are formed and a top plate 212 installed on the block frame is slidably installed under the top plate 212 and the floor suction is performed. And a slide plate 214 having an opening 213 corresponding to the mouth 211.
Is installed in the elongated hole 21 of the top plate 212.
6 and slides along the elongated hole 216 of the upright operation portion 215 so that the floor suction port 211 is moved to the slide plate 214.
The opening degree can be adjusted by matching or not matching the opening portion 213 of the. The open / close floor block 210 is laid on the entire surface of the pit 2 except for the center.

The normally open floor block 220 is shown in FIG.
As shown in FIG. 1, one floor suction port 221 is formed in the center and the top plate 222 is installed on the block frame. The floor suction port 221 of the top plate 222 is always open. It remains as it is. The normally open floor block 220 is laid in the center portion on the floor surface of the pit 2. A lattice-shaped cover body 230 is preferably fitted on the upper surfaces of the normally open floor block 220 and the open / close floor block 210.

To carry out the method of the present invention using such an apparatus system, the following procedure is carried out. Prior to the method of exhausting air during drying according to the present invention, the vehicle 100 is generally subjected to a coating process such as a correction coating or a whole surface coating. At the time of this coating, first, all the open / close floor blocks 210 are opened by sliding the slide plate 214 described above in the opening direction. As a result, the floor suction port 2 of the normally open floor block 220 is
Since 21 is always open, the entire floor on the pit 2 of the coating / drying room R is open. The bottom of the center of the vehicle 100 to be processed is just the normally open floor block 22.
It is loaded and installed so as to be located on the floor suction port 221 of 0.

In this state, the blower fan 5 is driven to
The outside air is guided to the ceiling air supply chamber portion R ₁ of the coating / drying room R through the air supply duct 1 and blown into the room. At this time, the hot air generator 7 is stopped, or when it is necessary to heat the coating drying chamber R in the winter or the like, the combustion burner 8 is ignited to drive the hot air generator 7 to obtain an appropriate temperature. Blow the hot air. 1 such air or hot air
Since dust and the like are removed by the secondary filter 4 and the secondary filter 9, they are introduced into the room in a clean state. Also,
The supply amount can be appropriately adjusted by adjusting the air volume switching damper 6.

The air or hot air thus supplied is sucked by the drive of the exhaust fan 11 on the exhaust duct 3 side, and as shown in FIG. 1, the floor suction ports 211 of all the open / close floor blocks 210. And, it is guided to the pit 2 of the underfloor portion R ₂ through the floor suction port 221 of the normally open floor block 220 and is exhausted to the outside. At this time, paint mitos and the like are removed by the exhaust filter 10, and clean air or hot air is exhausted to the outside.

In concrete coating, for example, an operator enters the coating drying chamber R and uses a coating spray gun or the like, or a coating device (coating robot) or the like to coat the vehicle 100 partially or entirely. Do it by spraying.

After the coating process is completed in this way, the coating surface is dried. In this drying process, first, the slide plate 214 is slid in the closing direction to close all the open / close floor blocks 210, and as shown in FIG. Block 22
Only the floor suction port 221 of 0 is set. That is, only the center on the pit 2 of the coating / drying room R is opened.

In this state, the blower fan 5 described above is also used.
The combustion burner 8 is ignited to drive the hot air generator 7, and the hot air is guided through the air supply duct 1 to the ceiling air supply chamber portion R ₁ of the coating / drying room R. Blow into. At this time, in order to reduce the amount of supplied air and reduce fuel consumption, the air volume switching damper 6 is adjusted,
Compared with the above-mentioned painting, the air volume is 1/2 to 1/3
Keep to a degree. As a result, the wind speed of hot air is 1
/ 2 to about 1/3. Of course, also in this case, the hot air is introduced into the room in a clean state because dust and the like are removed by the primary filter 4 and the secondary filter 9.

The hot air blown into the coating drying room R at such a low speed tries to descend toward the floor surface in the room at a slow speed, but at the time of the drying, the floor on the bottom surface of the vehicle 100 as described above. Since only the in-plane center portion is opened, as shown in FIG.
That is, concentrated exhaust is performed from the floor suction port 221 of the normally open floor block 220.

Of course, the concentrated exhausted hot air is sucked by the suction action by driving the exhaust fan 11 on the side of the exhaust duct 3, so that the velocity of the hot air in the room becomes faster as it approaches the floor surface suction port 221. . Therefore, a vertical portion such as a door portion of the vehicle 100 (a portion where it takes time to be heated to the drying temperature), particularly a portion below the door, has a large amount of heat supply, so that the temperature can be quickly raised to the drying temperature. You will be able to do it. However, the hot air coming into contact with a horizontal portion such as the roof portion of the vehicle 100 has a slow flow velocity, and thus is heated slowly. As a result, the horizontal portion of the vehicle 100, which is easy to warm, is heated slowly, and the vertical portion of the vehicle 100, which is hard to warm, is quickly heated.
The heating temperature in each part can be made uniform and quick.

Incidentally, according to an experiment conducted by the inventors of the present invention that carried out the method of the present invention, the temperature rising time of the ceiling portion of the vehicle 100 is almost the same as the conventional one and does not change much, but the door portion, particularly the lower portion of the door, etc. The heating time of the part where the temperature rise is difficult compared to when the entire floor is opened is 3
It was confirmed that a reduction of about 40% could be achieved.

When the inside of the coating drying chamber R becomes a negative pressure during the above exhaust, it becomes easy for foreign dust and the like to enter.
In the method of the present invention, the exhaust fan 11 may be adjusted to control the inside of the coating drying chamber R to a positive pressure.

4 to 7 show an embodiment of another coating drying apparatus system for carrying out the exhausting method of the coating drying chamber according to the present invention. This device system also has basically the same structure as the device system shown in FIGS. 1 to 3, but the underfloor exhaust duct 3 is divided into at least two systems 310 and 320, and one of the divided exhaust ducts 310 is divided. Is different from the above in that a wide range of floor suction ports 311 of the floor are communicated with each other, and the other divided exhaust duct 320 is communicated with only a part of the floor suction ports 321 of the floor.

The divided exhaust duct 310 is shown in FIG.
As shown in FIG. 5, a plurality of floor suction ports 311 are formed and a top plate 312 is installed on the block frame, and is normally laid on the floor surface of the pit 2 except the center. Communicating with the open floor block 313,
For example, an opening / closing damper 315 including a large number of swing opening / closing fins 314 is installed, and the divided exhaust duct 310 itself is opened / closed by opening / closing the swing opening / closing fins 314 manually or by an air cylinder. The opening / closing damper 315 is preferably detachable so that the paint mist and the like can be cleaned of stains and dirt.

On the other hand, the split exhaust duct 320 has a tip 320a of the duct passage as shown in FIG. 6, for example.
However, one floor suction port 321 is formed in the center of the room and it is composed of a top plate 322 installed on the block frame, and is a normally open floor block laid in the center portion on the floor of the pit 2. 323 is directly connected to the floor suction port 321 and the rear end is connected to a duct on the exhaust fan 11 side via a partition plate 324. Therefore,
The divided exhaust duct 320 is always open. In addition, it is preferable to fit the lattice-shaped cover body 330 on the upper surfaces of the normally open floor block 323 and the normally open floor block 313.

To carry out the method of the present invention by means of such an apparatus system, the following is carried out. First, at the time of coating, the above-mentioned opening / closing damper 315 is driven in the opening direction to open the floor suction ports 311 of all the normally open floor blocks 313 to the divided exhaust ducts 310. As a result, since the floor surface suction port 321 of the normally open floor block 323 of the other divided exhaust duct 320 is always open, the entire floor above the pit 2 of the coating / drying room R is opened. The bottom surface of the center of the vehicle 100 to be processed is just the normally open floor block 3.
It is loaded and installed so as to be located on the floor suction port 321 of 23.

The operation from this state is the same as in the case of FIGS. 1 to 3 described above, the blower fan 5 is driven, and the outside air is supplied through the air supply duct 1 to the ceiling air supply chamber portion of the coating drying room R. Lead to R ₁ and blow into the room. At this time, the hot air generator 7 is stopped, or when it is necessary to heat the coating drying chamber R in the winter or the like, the combustion burner 8 is ignited to drive the hot air generator 7 to obtain an appropriate temperature. Blow the hot air. Such air or hot air is introduced into the room in a clean state because dust and the like are removed by the primary filter 4 and the secondary filter 9. The supply amount can be appropriately adjusted by adjusting the air volume switching damper 6.

The air or hot air thus supplied is sucked by the drive of the exhaust fan 11 on the side of the exhaust duct 3, and as shown in FIG. 4, the floor suction ports 311 of all the open / close floor blocks 310. Then, through the floor suction port 321 of the normally open floor block 320, it is guided to the pit 2 of the underfloor portion R ₂ and is exhausted to the outside. At this time, paint mitos and the like are removed by the exhaust filter 10, and clean air or hot air is exhausted to the outside.

After the coating process is completed in this way, the coating surface is dried. In this drying process, first, the above-mentioned opening / closing damper 315 is driven in the closing direction to cut off the divided exhaust duct 310, and the floor suction ports 311 of all the opening / closing floor blocks 310 are closed, as shown in FIG. In addition, only the floor suction port 321 of the normally open floor block 323 is opened. That is, only the center on the pit 2 of the coating / drying room R is opened.

From this state, the blower fan 5 is driven to take in external air, and the combustion burner 8 is ignited to drive the hot air generator 7, as in the case of FIGS. Hot air is guided to the ceiling air supply chamber portion R ₁ of the coating / drying room R through the air supply duct 1 and blown into the room. At this time, to reduce fuel consumption by reducing the amount of air supplied,
The air volume switching damper 6 is adjusted to reduce the air volume to about 1/2 to 1/3 as compared with the above-described painting. As a result, the wind speed of the hot air is also reduced to about 1/2 to 1/3 of that during coating. Of course, also in this case, the hot air is introduced into the room in a clean state because dust and the like are removed by the primary filter 4 and the secondary filter 9.

Although the hot air blown into the coating drying chamber R at such a low speed tries to descend toward the floor surface in the room at a slow speed, at the time of the drying, as described above, the hot air on the bottom surface of the vehicle 100 is removed. Since only the center part under the floor is opened, as shown in FIG. 5, a part of the center,
That is, concentrated exhaust is performed from the floor suction port 321 of the normally open floor block 323. Due to this concentrated exhaust, FIG.
~ The same actions and effects as in the case of Fig. 3 are obtained.

Although the normally open floor block 220 is laid in the center portion on the floor surface of the pit 2 in the embodiments shown in FIGS. 1 to 3, the present invention is not limited to this.
An opening / closing floor block 210 is also laid in the center portion on this floor surface, and when drying, the opening / closing floor block 2 of this center is used.
It is also possible to handle only 10 in the open state. Although the object 100 is a vehicle, the present invention is not limited to this.

[0034]

As is apparent from the above description, the method of exhausting the coating / drying chamber according to the present invention has the following excellent effects. (1) First, at the time of coating, the same exhaust control as the conventional one is performed, and at the same time, at the time of drying, the air volume (air volume) is suppressed to about 1/2 to 1/3 as compared with that at the time of coating. At the time of the drying, since the floor suction port of the exhaust duct is opened only in a part of the floor, the flow velocity of hot air is low near the ceiling of the coating drying chamber, but the floor direction of the coating drying chamber is low. Therefore, the flow velocity increases. Therefore, it is possible to quickly raise the temperature of an object such as a vehicle not only in a horizontal portion such as a roof where temperature easily rises but also in a vertical portion such as a door where temperature hardly rises. it can. That is, the temperature difference in each part of the object can be effectively eliminated. As a result, in the case of a vehicle or the like, a uniform and high-quality coating state can be obtained on the coating surface of each part.

(2) Next, since the flow velocity is increased in the floor portion of the coating / drying chamber as described above, the heating of the entire object to the drying temperature is shortened. As a result, the drying time is shortened and the workability is greatly improved.

(3) Further, in connection with the speeding up of the flow velocity in the floor portion of the coating / drying room, the door linings, equipment, etc., which have been conventionally used to increase the temperature rising rate of the door portion, are removed. Since it is not necessary to do it or only the minimum required is sufficient, workability can be expected to be improved from this point as well.

(4) Further, from a different point of view, by increasing the flow velocity at the floor of the coating / drying chamber, the same effect as that of the conventional apparatus can be obtained. It can be small, and it can be expected to reduce equipment costs and running costs.

(5) Furthermore, by shortening the heating up to the required drying temperature of the object, it is necessary to use a heat insulating panel having a special heat insulating structure as the outer plate (side plate) structure of the coating drying chamber. Since there is no particular need for a single panel such as a normal steel plate, the equipment cost is also reduced and the temperature can be quickly lowered to the temperature suitable for the next coating process after the completion of drying in high temperature such as summer. It is expected that work squill will be shortened and workability will be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an operation state at the time of coating according to an embodiment of a coating drying apparatus system for carrying out a method for exhausting a coating drying chamber according to the present invention.

FIG. 2 is a vertical cross-sectional view showing an operating state during drying of the coating / drying apparatus system of FIG.

FIG. 3 is a perspective view with a partial development view showing an example of an exhaust duct in the coating / drying apparatus system of FIG.

FIG. 4 is a vertical cross-sectional view showing an operating state at the time of coating according to another embodiment of the coating drying apparatus system for carrying out the method for exhausting the coating drying chamber according to the present invention.

5 is a vertical cross-sectional view showing an operating state of the coating drying apparatus system of FIG. 4 during drying.

6 is a perspective view with a partial development view showing an example of an exhaust duct in the coating / drying apparatus system of FIG.

[Explanation of symbols]

R Paint drying room R ₁ Ceiling air supply room R ₂ Underfloor 1 Air supply duct 2 Pit 3 Exhaust duct 4 Primary filter 5 Blower fan 6 Air volume switching damper 7 Hot air generator 8 Combustion burner 9 Secondary filter 10 Exhaust filter 11 Exhaust fan 100 Object 210 Opening / closing floor block 211 Floor suction port 220 Normally open floor block 221 Floor suction port 310 Split exhaust duct 311 Floor suction port 320 Split exhaust duct 321 Floor suction port

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masanobu Yoshioka 3-5-28 Mita, Minato-ku, Tokyo Nissan Altia Co., Ltd.

Claims (4)

[Claims] 1. A coating installed on the floor of the coating / drying chamber by connecting an air supply duct to the ceiling air-supplying chamber of the coating / drying chamber and an exhaust duct to the underfloor of the coating / drying chamber. In the coating drying chamber, which sends hot air from the air supply duct to the ceiling part of the coating drying chamber and exhausts it from the exhaust duct under the floor to dry the coated surface of the target object. A method for exhausting a coating / drying chamber, wherein a floor suction port of the exhaust duct is freely opened to the whole surface or a part of the floor. 2. A plurality of open / close floor blocks each having a floor suction port openable and closable are laid on the entire surface of the floor, and the floor suction port of the floor block is opened / closed so that all or part of the floor is opened. The method for exhausting a coating / drying chamber according to claim 1, wherein the opening is made freely possible. 3. A plurality of open / close floor blocks each having a floor suction port configured to be openable and closable and a normally open floor block configured to have a floor suction port constantly opened are laid on the entire surface of the floor. 2. The whole or a part of the floor is freely opened by opening / closing the floor suction port of the opening / closing floor block and opening the floor suction port of the normally open floor block. Exhaust method of the paint drying room. 4. An underfloor exhaust duct is divided into at least two systems, one system of which is connected to a wide floor suction port of the floor, and the other system of which is a partial floor suction port of the floor. Only communicate with each other, the exhaust control of these two systems,
The exhaust method for a coating / drying chamber according to claim 1, wherein the entire surface or a part of the floor is freely opened.